Tool driving or impacting – Automatic control of power operated means
Reexamination Certificate
2005-12-06
2005-12-06
Gerrity, Stephen F. (Department: 3721)
Tool driving or impacting
Automatic control of power operated means
C173S176000, C173S179000, C318S281000, C318S293000
Reexamination Certificate
active
06971454
ABSTRACT:
A drill/driver (e.g. an electric drill) with a screwdriver bit attachment, and a method of controlling the drill/driver, are described. This method of control will greatly reduce the occurrence of stripped screw heads on most types of screws. By periodically stopping insertion of a screw and reversing direction of the screwdriver bit, the screwdriver bit will be reinserted fully back into the screw head. By ensuring the screwdriver bit is always fully inserted in the screw head, the stripping of a screw head will be prevented. This can be easily implemented on most types of powered screwdrivers including the most common device used for screw insertion on a construction job site, the cordless drill/driver.
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Gerrity Stephen F.
Truong Thanh
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